I've booked Preve CFE ANCAP 5 Star ver., solid white, pending on loan approval

Just wanna ask (pretty sure somebody has asked/posted them before but it's very difficult to search for it among the sea of posts here, from V1 to V19...)
1. Can I add reverse camera and tweeter to the HU by simply plugin or rewiring is needed?
2. The empty button slot next to the push start button is for headlamps levelling switch right? Does the ori headlamps comes with levelling motor and wiring so that I can simply buy a switch to plug in?
3. RM1500 for R3 body kit including installation+labour charges? Or any nice looking body kit recommendation?
4. My SA told me I can wrap leather seat/trim but will this affect the side airbags functionality?
BTW, my SA said Preve LE still open for booking, even the 100 units quota finished, but the delivery will take ages. don't know true or not.

Same wih me..order cfe ancap version solid white colour...loan approved already..this tuesday go sign aggrement..and planning to get r3 bodykit and r3 sportrim..